https://donate.barackobama.com/Join-OFA-in-DC

No purchase, payment, or contribution necessary to enter to win. Void where prohibited. Entries must be received by 11:59 p.m. on December 31st, 2013. You may enter by contributing to the Sponsor here. Alternatively, visit here to enter without contributing. Two winners will receive the following prize package: round trip tickets for winner and one guest from within the fifty United States, DC or Puerto Rico to Washington, D.C.; hotel accommodations for winner and one guest; tickets for winner and one guest to the OFA Anniversary Party (approximate combined retail value of all prizes $985. Odds of winning depend on number of eligible entries received. Promotion open to all U.S. citizens, or lawful permanent U.S. residents who are legal residents of the 50 United States and District of Columbia and 18 or older (or of majority under applicable law). Promotion subject to Official Rules and additional restrictions on eligibility. Sponsor: Organizing for Action, 224 N. Desplaines St., Suite 5000, Chicago, IL 60661.